Stranger joins pastor for heartwarming duet at Texas hospital

It's kind of like an old time movie -- just two people sitting at the piano singing together. But what's surprising is the woman, Vera Swain, had never even heard the song before!

Pastor Mark Willhoite was volunteering at a Texas hospital with his wife when he sat down to play some religious tunes he was working on. Vera was passing by and randomly joined in. The video shared by his wife now has more than 6 million views.